Writing instrument



FIG. 1 is an isometric view of the present invention;

FIG. 2 is a left side view of the present invention with the writing tip retracted;

FIG. 3 is a right side view of the present invention with the writing tip retracted;

FIG. 4 is a front view of the present invention with the writing tip retracted;

FIG. 5 is a rear view of the present invention with the writing tip retracted;

FIG. 6 is a top view of the present invention with the writing tip retracted; and,

FIG. 7 is a bottom view of the present invention with the writing tip retracted. 

The ornamental design for a writing instrument, as shown and described. 